Alexander III and the Schism of the Holy Roman Empire's Papal Authority

Timeline

1. 1161–1164Rome and Pavia · LombardyIn the early 1160s Frederick I openly backed the antipope at the Council of Pavia and elsewhere, and most German bishops, under imperial pressure, recognized the emperor's pope. Alexander III countered with excommunication and exile diplomacy to win support from France, England, and southern Italian princes, entrenching the dual-papacy standoff across Europe.
2. 1164–1167Border regions of France and Germany · GermanyAt councils such as Reims in 1164, some German bishops, mediated by monarchs like Louis VII, switched to recognizing Alexander III. Through conciliar rulings, threats of excommunication, and diplomatic promises, the papal curia gradually dismantled the imperial-papal alliance, though Frederick still maintained the loyalty of the German Church by military and administrative means.
3. 1167–1170Latin Christian world · EuropeBy the late 1160s the papal schism continued to hamper crusade mobilization and internal Church reform agendas. Monarchs exploited the split to gain advantages in Church appointments and taxation; though Alexander III won broad recognition in France, England, and elsewhere, he could not restore unified Church authority within the empire, laying the groundwork for the later Peace of Venice.